[sdiy] OTA performance (was SSM chip reissue)

[Gordonjcp]

On Wed, Apr 26, 2017 at 01:33:55PM +1000, Paul Perry wrote:
> It would be a wonderful thing, if Oberheim had somebody deliberately
> unmatching OTAs..
> 

Probably a big tin bucket on the floor, where the "not good enough for the filter" ones get flung :-)

> Seriously though, I very much appreciate your comments
> on this.. I suspect that a lot of unhappiness in my life
> was due to unmatched LM13700 halves.

They'd have to be horribly unmatched to make something properly Not Work.

I don't get why people are matching OTAs in the first place.  You need to have some adjustment over range and offset for the VCF to compensate for all the other tolerances, and you won't hear a mismatch between VCAs unless it's grossly out to the point of being faulty.

-- 
Gordonjcp MM0YEQ